<title>Novel type of red-sensitive photopolymer system for optical storage</title>

Abstract

In this paper, a novel type of red sensitive photo-polymer system for optical storage, here called RSPP, is presented. First of all, the components in RSPP, for example, photo-sensitizer, photo-initiator, monomer, copolymer, combiner, stablizer, hardener, and fabrication and processing technique of RSPP are given. Then, the absorption spectrum of RSPP material is measured. And the result shows the material is only sensitive to read light, whose absorption peak is at 662nm and half-width of the absorption is about lOOnm. After that, the property of exposure in RSPP is studied. It is found that RSPP holographic plate has several advantages over the optical storage (holographic optical storage) material previously reported. First, This RSPP is fit to record both transmission holograms and reflection holograms. Second, the holograms recorded in RSPP plate can be processed both in dry and in wet processes due to its strong real-time effect. The performance parameters of the ESPP are following: (a). The photosensitivity is about 2 at 630 nm; (b). the resolution of the material is more than 4000pp/mm; (c). the saturation refractive index modulation is 0.0034 and 0.0141 for real time and wet processing respectively. In the study of the exposure in RSPP holographic plate, some other phenomena concerning real time effect in RSPP, such as, light-amplification and modulation of single light beam effect, are found. The mechanism of these phenomena is discussed.

A Review of Hologram Storage and Self-Written Waveguides Formation in Photopolymer Media

“…A hybrid material containing acrylamide and acrylic acid as monomers was proposed by Zhao et al [ 53 ]. Materials such as methylene blue, TEA and p -toluenesulfonic acid and gelatin are used as photosensitizer, sensitizers and binder, respectively.…”

A Review of the Optimisation of Photopolymer Materials for Holographic Data Storage

“…Blaya et al [30] improved the sensitivity of the acrylamide material for recording at 633 nm by changing the cross-linker, N,N -(1,2-Dihydroxyethylene)bisacrylamide. A hybrid material containing acrylamide and acrylic acid as monomers was proposed by Zhao et al [31]. The material uses methylene blue as the photosensitizer, TEA and p-toluenesulfonic acid as sensitizers, and gelatin as a binder.…”

Photopolymers for Use as Holographic Media

“…Blaya et al, [21], improved the sensitivity of the acrylamide material for recording at 633 nm by changing the crosslinker, N,N-dihydroethylenebisacrylamide. A hybrid material containing acrylamide and acrylic acid as monomers was proposed by Zhao et al, [22]. The material uses methylene blue as the photosensitizer, TEA and ptoluenesulfonic acid as sensitizers and gelatin as a binder.…”